Induction meter



April 15, 1930. I F 'H C ET AL 1,755,110

INDUCTION METER Filed July 19, 1928 77 y j 50 75 1 83 76 111 :5; 12 0' 73 L 412 11.9 1 113 M7 a lNVE/VTOFS 5 Y 86 641W BY 50W I I. v

LED 1 ST ATE PAT ENT -F15 Hans raonLIoH Am)" niccannrnnninio, "or j'zUe, SWITZE LAND, ASSIGNORS T0 L ANDIS & GYR, Al-Ga, AJo INT-suiooK ,CGMPANLY or SWITZERLAND innuoi'ion METER Application filed 511137119, 152$,Serial'Nd; 293,940, and Sin Switzefland Seutniber 24,. 1927.

' The inventionhrelates tone-rel and useful improvements in induction meters, and more particularly to such improvements in the con struction and positional regulation of the 5 electro-magnetic :driving elementsand electro-.magnetic Connections therebetween.

. Objects and :advantages or theinvention will beset forth in parthereinaiter and in part Will be obvious here-from, or may be.

learned by practicewith the inventiomthe same being realized'an'd attained'by: means of theinstrument'alitiesand combinations pointed outin theap pended claims. I I The invention consists :in the-novel parts, construction, arrangements, combinationsand improvements herein shown and described. flhe' accompanying drawings, referred to herein and constituting a part hereof, fillustrate one embodiment of the invention, and together ivithjthe description, serve to explain the principles ofthe invention. r

Ofthedrawings g ,Fig. l is an elevation, with part's'omitted, ofa meter mechanism embodyingtlie in- -vention; Q Q 7 V Fig-i2 is'a top plan correspondingto Fig.

1,- Withcertain partsomitted;

elfectedr'; and concomitantly there ith-rela tive .adj ustment of I the driving magnets and 'tlieirpart are very quiokly and easilyeffected,

ithout disturbing the operationof the elec tro-magnetic shunt path. Inimeters having vwith a smaller number of ampere-terms of driving systems-of the type described, and

wherein :the shunt path elements I are formed of-a single piece, or ofa groupoi' plates'or lamella, the assembling of'th'e instrument is rendered complicated, dlfilCUl"- and expensive,

since the individual lamella to constituteltlie 'by'hand on the-finished laminatediron core.

[Fig. is an elevation of a modified em bodinient, with certain parts omitted; and

I Figs is a similar elevation, another modified embodiment ofthe invention. I 'l he invention is directedto improvements inthe type of induction meters wherein the magnet cores of the driving system, for eitample,ithe pressurie andcurrent cores, are connected-together "by, a ferromagnetic met-a l connection, constituting a magnetic shunt, usually consisting of platesorlaminae of iron uniting the driving magnetcore's, Which'are the same or similar to the platesiorlaminae of the core, and Which are frequently made integral with the core, In induction meters of this type, having connections such as described, the reluctancesloithe pat, fectivflri ing'fiuxe are ire'duced, endures Furthermore, even Wlth=COllS in WlilCll'iZllG lamellze are arranged in layers, any exchange or replacen'ient of p arts, such as would i be required by reason of adefect in a coilis'not possible. i 1 f s Simply 3 constructing the various core i and shunt elements in separate parts, while it facilitates the assembling o'fthe .parts,'presents serious" practical dilficulties' in that it difiicult orvv' 'ell nigh impossible "to jeil e'ctaccurate relative adjustment of the core elements with respect-to e'acli Otherand to the-meter By the'pres'entinvention, We provide a 1nultipart core and magnetic shunt: structure to gether with means and. devices \vhereb'y'these i may ,bevaccu'r'ately positioned and uniformly and accurately adjusted with respect to the drivenimeter elemrntsand toeaclro'ther .without disturbing the operation of the shunt connection.

Referring now in detail to the exemplary embodiment of Figs. 1 and 2, a frame 1 is shown on which a pressure core 2 is mounted. In this embodiment the pressure core has three arms, 3, 4 and 5, which are substantially parallel, the pressure coil 5 being mounted on the central arm 4. The terminal pole of the arm 4 is preferably laterally extended in both directions as shown at 6, and constitutes an enlarged pole terminal for the pressure flux and also provides air gaps between thispole and the opposite sign pressure poles at either side.

The meter disc 13 is mounted on a spindle 14, which is journaled at its bottom end in a screw-threaded bearing 15, mounted in a bracket 16, carried onthe meter framel. At its upper end, the spindle 16 is journaled in a screw-threaded bearing 19 supported in a bracket 20, which is likewise carried on the meter frame 1. A worm 21 on the spindle serves to drive a register of any known or other suitable form.

' poles, and mounted on these arms are current coils 29 and 30, these arms being connected together by the central transverse part 31 of the core. The magnetic shunt path in this embodiment is provided by arms or extensions 35 and 36 integral with and extending from either side of the current core and preferably integral therewith, these arms extendmg upwardly and terminating in faces 37 and 38 In close sliding contact with corresponding faces 39 and 40, formed on the outer sides of the ends of the core terminals 3 and 5 of the pressure magnet. These contacting and magnetically conducting faces are preferably arran ed parallel to theaxis of the meter spindle.

In the embodied form of supporting and positioning means, bolts and 46 aremounted in apertures in the meter frame'l and extend through apertures in the lower ends of the pressure core arms 3 and 5, and nuts 47 and 48 are screw-threaded on the bolts to support and to hold the core in place. The bolts 45 and 46 are also utilized to support the magnet positioning means, and as embodied, there are interposed between the pressure core and theframe bell-crank levers 49 and 50, which are pivotally mounted on the respective supporting bolts 45 and 46. Into the outer ends of the horizontally-extending arms of the bell-crank levers are screwed, respectively. screws 51 and 52,upon which the arms 35 and 36 of the current core construction'are pivotally supported.

To provide fine and accurate positioning means, difierential screws 55 and 56' are screwthreaded into the respective side flanges'of the meter frame 1, the inner ends of these screws passing through apertures in the downwardly-extending arms 57 and 58of the bell-crank levers. The heads of these screws on the far sides of the two lever arms are beveled or'rounded, and the apertures in the arms are shortened and are correspondingly tightly against the frame plate 1-, to clamp the parts in position, and may be slightly unscrewed to permit movement of the parts during the positioning operation.

In the modified embodiment of Fig. 3, a pressure magnet is shown having three arms 65, 66 and 67, the pressure coil 68 being. mounted upon the central arm. The outer arms and67 of the core are shown with lateral extensions 69 and 70 extending toward the pole terminal of the central arm 66, of the core. The current magnet is shown with a core having two arms 71 and 72' and correspondingpoles, the current coils 7 3 and 74' being carried'upon these two arms.

The shuntpath connections in this form are likewise constitutedvby arms 75 and 76, extending outwardly and upwardly at either side of the current magnet and terminating in faces 77 and 7'8 which are in close contact with similar faces 79 and 80 on the outer sides of the terminals of the arms 65 and 67 of the pressure magnet, these contacting faces being preferably parallel to the axis of the meter spindle. These contactingterminals 79 and 80 of the pressure magnet core arms 77 and 78 and of the shunt path arms 75 and 76, are provided with alined complementary recesses 83 and 84. One of the magnets, at

least, and if desired both, are provided with supporting means,'which are movable and clampable in different positions, as for instance, the current magnet may have bolt and'slot connections 85 and 86 with the frame plate 1. By inserting a screw driver, or other suitable implement in the slots 83 and 84 (as indicated. at the left hand side of Fig. 3), and slightly rotating same in either direction, a-nice and accurate adjustment of the magnet terminals withrespect to each other and with respect to the meter disc 'or other driving elements, may be eflected,.the supports being very slightly loosened preparatory to such movement and being tightened thereafter to clamp the magnets in the desired position; V

In the embodiment of Fig. 4, a pressure magnet is shown having a central arm 91 and side arms 92 and 93, the pressure coil 94 beingwound on thecentral arm, The lower 'parts ofthe arms92 a d 93 of the c re have and 112 formed on the arms 105 and 106,these faces being preferably parallel to the axis of this construction comprises downwardly extending arms 103 and 104, integral with the arms 92 and 93 of the pressure core, and

corresponding outwardly and laterally eX- 'tending arms 105 and 106, integral with the currentcore. The arms 103 and 104 terminate in contact faces109 and 110,'and in sliding vcontact therewith are contact faces 111 the meter spindle. The embodied form of positioning means in this structure comprises pairs of plates 115 and 116 attached by pins 120 at either'side to the arms 103 and 104 (the front left-hand-plate in Fig. 4 being omitted). vThese pairs ofplates serve as guides on either side, and at either end, of the arms 105 and 106. Screws 117 are screwthreaded into the plates 115 and 116 respectively and these screws carry affixed thereto eccentrics 118, which work in apertures 119 in the respective arms 105 and 106. By turning the screw-bolts" 117 the magnets may be. Va-

riably positioned with respect to each other. The pressure core is preferably supported on the frame of the meter by suitable means such as screws in the apertures 119. It will be clear that the various forms of positioning means may be employed with the difierent forms ofcore arms and mountings. v

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departuresmay be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

What we claim is o y 0 1. An induction meter including in com I bination a driven meter member, driving means therefor comprising a plurality of cooperating electro-magnets, and connection between the cores of said electro-magnets consisting of ferro-magnetic metal and means for variablypositioning said cores'without breaking said connection. I 7 I 2. An induction meter including in combination a driven meter member, driving means therefor comprising a plurality of cooperating electro-magnets, and connection between the cores of said electro-magnets consisting of ferro-magnetic'metal, means for variably positioning said cores without breaking said connection and means for hold- I ing a core in a desired position. 7

3. An induction meter including in combiand cores,yand connection fbetween 'saidr core's comprising memberjsfhaving fa'cfes 'in contae't',

and means for moving" one; of the Tomes w l'ii le in-aintainiiig'said faces "in con-tact;

4. An induetion' ineter including in combiiration 1a driven meter member,- driving *means therefor comprising -a'1)iurality of cooperating electr'o the cores of said e'lectro-magnets comprising a member magneticallyconnected-to the coreof I one niia gnet, a member ii iagnetica'llly con nected 'to the coreof another -inagnet, sa-1d magnets, and eonnectionbetween niei'nbers ihaving contacting faces,-andnieans for moving. one of=said inagnetswliile main:

taining. said faces iii contact'. i

5. An induction :nietei' including in combination a driven meter'meinber, driving means therefor comprising a'plurality' of cooperating electro-magnets, and connection between the cores of said electro-magnets consisting of ferro-magnetic metal, means for variably positioning said cores without breaking said connection and screw-threaded means'for movably positioning one magnet with respect to another.

6. An induction meter including in com bination a driven meter member, driving means therefor comprising a plurality of cooperating electro-magnets, and connection between the cores of said electro-magnets comprising members having faces in contact, means for moving one of the magnets, while maintaining said faces in contact and means for holding a core in a desired position. 7

7. An induction meter including in combination a driven meter'membier, driving means therefor comprising a plurality of cooperating electro-magnets, and connection between the cores of said electro-magnets comprising members vhaving faces in contact, means for moving one of the magnets while maintaining said faces in contact and aou screws threaded means for movably positionfaces, means for moving one of said magnets. while maintaining said faces lIl contact andmeans for holding a core in a desired position. g

9. An induction meter including in combination a driven. meter member, driving" means therefor comprising a plurality of cooperating electro-magnets, and connection between the cores of said electro-magnets comprising a member magnetically connected to the core of one magnet, a member mag- 111-'58 netically connected to the core of another magnet, said members; having contacting faces, means for moving one of said magnets While maintaining said faces in contact and screw-threaded means for movably positioning one magnet With. respect to another.

10. An induction meter including in combination a driven meter member, a Voltage coil and core, a separate and distinct current coil and core, a ferro-magnetic connecting member connecting said cores and means for variably positioning said cores While maintaining the connection between said cores.

In testimony whereof, We have signed our names to this specification.

HANS FRoHLIcH. RIGCARD PUDELKO. 

